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rule_expr_assign_abstract Class Reference

Inheritance diagram for rule_expr_assign_abstract:

[legend]List of all members.

Public Member Functions
virtual value_assign_base *	evaluate (const constraint_solver *s) const =0
virtual dependency_t	is_dependent_on (const const_accessor &, symbol_table_interface *) const =0
virtual	~rule_expr_assign_abstract ()

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Detailed Description

• The basic building block is rule_expr_assign_concrete <E>. This object stores the assignment typed_accessor<E>=expr<E>.
• rule_expr_assign_abstract is an abstract base class for the concrete assignment. This abstract base class hides any implementation dependant types and code. It also hides the template instantiation and solves the MS Visual Studio error 'class must have DLL interface to be used by clients'. Expressions created by clients of the constraints mechanism will have their template instantiations in their own code space. The constraints mechanism doesn't need to have any access besides 'evaluate'.
• rule_expr is the concrete rule for the abstract rule_base class. It hides the type of the rule from the constraints mechanism.

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Constructor & Destructor Documentation

virtual ~rule_expr_assign_abstract (   )  [virtual]

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Member Function Documentation

virtual value_assign_base* evaluate (  const constraint_solver *  s  )  const [pure virtual]

Implemented in rule_expr_assign_concrete.

virtual dependency_t is_dependent_on (  const const_accessor &  , symbol_table_interface *  )  const [pure virtual]

Implemented in rule_expr_assign_concrete.

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Copyright 2004, Hajo Kirchhoff, Lit Window Productions